28705845133005 has 16 divisors (see below), whose sum is σ = 46237602902400. Its totient is φ = 15207033841088.

The previous prime is 28705845132983. The next prime is 28705845133019. The reversal of 28705845133005 is 50033154850782.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28705845133005 - 2¹⁵ = 28705845100237 is a prime.

It is a super-2 number, since 2×28705845133005² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6421887057 + ... + 6421891526.

It is an arithmetic number, because the mean of its divisors is an integer number (2889850181400).

Almost surely, 2^{28705845133005} is an apocalyptic number.

It is an amenable number.

28705845133005 is a deficient number, since it is larger than the sum of its proper divisors (17531757769395).

28705845133005 is a wasteful number, since it uses less digits than its factorization.

28705845133005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12843778740.

The product of its (nonzero) digits is 4032000, while the sum is 51.

Adding to 28705845133005 its reverse (50033154850782), we get a palindrome (78738999983787).

The spelling of 28705845133005 in words is "twenty-eight trillion, seven hundred five billion, eight hundred forty-five million, one hundred thirty-three thousand, five".